16640868 has 24 divisors (see below), whose sum is σ = 40517568. Its totient is φ = 5305696.

The previous prime is 16640851. The next prime is 16640879. The reversal of 16640868 is 86804661.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29871 + ... + 30422.

It is an arithmetic number, because the mean of its divisors is an integer number (1688232).

Almost surely, 2^16640868 is an apocalyptic number.

It is an amenable number.

16640868 is an abundant number, since it is smaller than the sum of its proper divisors (23876700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16640868 is a wasteful number, since it uses less digits than its factorization.

16640868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60323 (or 60321 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 16640868 is about 4079.3220024901. The cubic root of 16640868 is about 255.3046109908.

The spelling of 16640868 in words is "sixteen million, six hundred forty thousand, eight hundred sixty-eight".